In this study, the VARTM process was selected among polymer processing and composite manufacturing methods because the process takes advantage of a vacuum for resin infusion and contains many sites for the heterogeneous nucleation at the tool and fiber surface.

The experiment can be thought as a "pseudo" infusion for the VARTM process because a bubble formation phenomenon was also observed in the infusion line itself of the VARTM process.

The hydroxyl hyperbranched polymers have been shown to increase the viscosity of blends cured by diaminodiphenylsulfone up to values that allow for their use in processes like resin film infusion but preclude their use for RTM or VARTM (21).

Also known as LRTM, ECO, Vacuum Molding, and VARTM, the RTM Light process features a lightweight, semi-flexible upper mold half and is based on what would be considered minimal tooling structure as compared with the traditional RTM or other closed-molding processes, according to JHM Technologies, a specialist in RTM systems, tooling, accessories, and training.

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